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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 491 · 40 questions
TalentJR

How it works (Double and halve): Find the number ending in 5 and the even number. Double the one ending in 5; halve the even one. Repeat while it helps (25 → 50 → 100), then multiply.

NameDateTime takenScore ___ / 40
  1. 1.55 × 8 =
  2. 2.24 × 75 =
  3. 3.45 × 30 =
  4. 4.12 × 15 =
  5. 5.15 × 10 =
  6. 6.8 × 75 =
  7. 7.14 × 65 =
  8. 8.28 × 25 =
  9. 9.25 × 26 =
  10. 10.15 × 40 =
  11. 11.6 × 15 =
  12. 12.10 × 25 =
  13. 13.65 × 34 =
  14. 14.55 × 8 =
  15. 15.65 × 10 =
  16. 16.14 × 15 =
  17. 17.45 × 22 =
  18. 18.24 × 25 =
  19. 19.15 × 8 =
  20. 20.15 × 22 =
  21. 21.65 × 10 =
  22. 22.30 × 125 =
  23. 23.25 × 26 =
  24. 24.15 × 18 =
  25. 25.65 × 6 =
  26. 26.18 × 25 =
  27. 27.34 × 125 =
  28. 28.38 × 25 =
  29. 29.28 × 75 =
  30. 30.36 × 15 =
  31. 31.38 × 75 =
  32. 32.45 × 18 =
  33. 33.125 × 10 =
  34. 34.40 × 65 =
  35. 35.45 × 36 =
  36. 36.25 × 18 =
  37. 37.16 × 25 =
  38. 38.55 × 28 =
  39. 39.15 × 16 =
  40. 40.125 × 16 =

Answer key

  1. 440
  2. 1800
  3. 1350
  4. 180
  5. 150
  6. 600
  7. 910
  8. 700
  9. 650
  10. 600
  11. 90
  12. 250
  13. 2210
  14. 440
  15. 650
  16. 210
  17. 990
  18. 600
  19. 120
  20. 330
  21. 650
  22. 3750
  23. 650
  24. 270
  25. 390
  26. 450
  27. 4250
  28. 950
  29. 2100
  30. 540
  31. 2850
  32. 810
  33. 1250
  34. 2600
  35. 1620
  36. 450
  37. 400
  38. 1540
  39. 240
  40. 2000

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